Angler's Pal Multi-Mounts offers the flexibility to mount your fish finder/depth sounder anywhere in the boat for easy reading. They give you a 360 degree full hemisphere of possible positions. The units feature a universal ball locking device with a "select position" locking knob making them virtually vibration free. The Multi-Mounts are made of rust resistant stainless steel/black hard anodized aluminum for fresh and saltwater usage. An "Allen" wrench easily removes your fish finder/depth sounder for security or storage.